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| author |   Jason A. Donenfeld <Jason@zx2c4.com> | 2017-10-15 21:29:01 +0200 |
|---|---|---|
| committer | Jason A. Donenfeld <Jason@zx2c4.com> | 2017-10-17 19:26:07 +0200 |
| commit | 7fe7f81088d9ff3fb392c12ca970e79cc78e1061 (patch) | |
| tree | 8dd9154a4485f83553721a5eee8cf9fc3a4a1a3e /src | |
| parent | Makefile: even prettier output (diff) | |
| download | wireguard-tools-7fe7f81088d9ff3fb392c12ca970e79cc78e1061.tar.xz wireguard-tools-7fe7f81088d9ff3fb392c12ca970e79cc78e1061.zip | |
wg: encoding: be more paranoid
Needless, but overkill can be fun.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Diffstat (limited to 'src')
| -rw-r--r-- | src/encoding.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/encoding.c b/src/encoding.c index 3d5e94b..c407b57 100644 --- a/src/encoding.c +++ b/src/encoding.c @@ -102,10 +102,10 @@ bool key_from_hex(uint8_t key[static WG_KEY_LEN], const char *hex) bool key_is_zero(const uint8_t key[static WG_KEY_LEN]) { - uint8_t acc = 0; + volatile uint8_t acc = 0; for (unsigned int i = 0; i < WG_KEY_LEN; ++i) { acc |= key[i]; __asm__ ("" : "=r" (acc) : "0" (acc)); } - return acc == 0; + return 1 & ((acc - 1) >> 8); } |